Antichamber

First of all the thing im considering a bug is when you get a green gun or better if you make a cube that fills in around you the game crashes, it may only be my computer. and to the suggestions prehaps some DLC could be nice, like to get DLC in the Main room a differernt chamber called "DLC" appears in a unused spot and then you click on it and you get to a DLC main room where you can do all the DLC you bought something to that lines.

It is because there is no "action on death" scripted in; mainly because you're not supposed to be able to die. It was patched somewhat with an update on february 28th, where you can grow smaller cubes, even with you inside. There is a certain threshold with the size of the cube you make. Us speedrunners use the lag that creating a cube generates in order to do some weird tricks.

It's actually more of both. There is no "action on death" so if the game calls for the death action, the game crashes. It's also a crash due to too many cubes being grown all at once (you can also crash the game if you try to middle mouse+left mouse for too long). It's not really a large amount of computation though; the algorithm used to grow cubes is unstable.

But is there even any death programmed into the game? Why would the game try to look for an action on death if the game doesn't even recognize death is a thing? Seems like a check that players could just be making up, as I wouldn't expect the game to even do something it wasn't meant to do. And it isn't a "It wasn't meant to do this so it crashes" thing, it's just a program. If it wasn't meant to do that, it just plain won't do that.

There's no other instance of death in the game, so I'm a little skeptical that this one particular action actually results in death. And considering how the game can similarly crash without actually being inside the cube, I find it even harder to believe the problem is due to the game making a non-existent search for a non-existent action.

It was originally a UT3 mod, so death is a thing that "could" happen if the dev had added in anything that damaged you. Even though it's not a UT3 mod anymore, it's still built off of UDK, meaning that it has a lot of defaults that the dev doesn't use (touchscreen controls, for example, are included but unused). A life meter along with health/hp is included but unused because "nothing" should be able to give you any damage value. Getting stuck inside a solid wall (filling in a cube around yourself) would cause you damage if it had been used, but because it's not then the game crashes when it tries to apply a damage value (or an action on death).